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l 1 I I I l J um--- f E'atented Aug. 31, 1880.

W. W. WHITE. l -Feed Motion for'Burnishing Machines.

(No Model.)

UNITED STATES PATENT OEETGE.

WILLIAM IV. WHITE, OF WATERBURY, CONNECTICUT, ASSIGNOR TO` ROGERS St BROTHER., OF SAME PLACE.

FEED-MOTION FOR BURNISHING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 231,876, dated August 31, 1880.

Application filed May 2:2, 1880.

To all whom it may concern Be it known that I, WILLIAM W. WHITE, of Waterbury, in the county of New Haven and State ofConneeticut, have invented cer- 5 tain new and useful Improvements in Feed- Motions for Burnishilig-Machines, ot' which the following` is a specification My invention relates chiefly Ito burnishingmachines for burnishing the bowls of spoons, ro but might be applied to burnishing other articles having a convex and a concave side,

In such machines two burnishers are arranged opposite each other and adapted to bear upon the spoon-bowl at opposite points i 5 inside and outside the same, as shown in Letters Patent No. 23,520, granted April 5, 1859, to Le Roy S. White.

In machines of this kind the burnishers are held in a stock which is pivoted to a rockzo shalt, by the oscillation of which the burnishers are moved over the spoon from shank to tip lengthwise of the.bowl, and the required feed ofthe burnishers from side to side of the bowl has been effected by a. reciprocating rackbar longitudinally movable within the rockshaft and engaging with a toothed segment upon the bnrnisher-stock to turn the latter forward and back. A fixed screw is arranged parallel with and connected to said rack-bar,

3o` and a nut fitted to said screw and held` in fixed hearings isrotated to produce the forward and backward movement of the rack-bar. Motion is imparted to the rack-bar by means of open and cross belts and a clutch; and my invention consists in a novel combination of mechanism for rotating the nut of the feedscrew, and also for shifting the clutch, so as to reverse the direction of the movement of the feed-screw.

4o In I he accompanying drawings, Figure l represents an end view and partial section of a` (No model frames of the machine, and B and C designate rails extending from one end to the other of the machine. The rail B is furnished with a number of clamping devices for clamping and holdingthe shauks of the spoons, which devices may be operated by cam-levers D to clamp or release a spoon. The rail C is provided with a number of set-screws, C', which are notched in their ends, so as to form supports for the tips ofthe spoons, as shown clearly in Fig. l. 6o

E designates a burnisher-stock, of which any number may be employed, (shown as of circular form,) and provided with two sockets, E', arranged in line with each other, and receiving in them burnishers F, between the adjacent ends of which a spoon-bowl, S, may be inserted, as shown clearly in Fig. 3, through an are-shaped slot, o, in the stock E.

The burnishers F both slide freely in their sockets E', and are caused to exert a pressure 7o upon opposite sides of the spoon-bowl by a bent spring, a, the two ends of which engage with the two burnishers, as lshown in Fig. 3, and press them together or toward each other.

G designates the rock-shaft, which is oscil- 75 lated by a crank or eccentric in the usual manner, and to which the stocks E are secured by pivots b.

. H designates the feed-bar, contained within a recess, G', in the back ofthe rock-shaft, and 8o toothed to engage with a circular rack, c, upon the stock E.

I designates a feed-screw attached to an arm,

I', projecting from the feed-bar H, and I2 designates a nut by which the screw I may be oper- 8 5 ated to reciprocate the feedbar and impart a partial rotation to the burnisher-stocks E.

J designates the Vdriving-shaft, upon which are pulleys J J', one of which receives an open and the other a crossed belt. J2 designates 9o a clutch adapted to be shifted longitudinally on the shaft by an arm, J 3, and serving to shift the 'clutch J2, so as to lock either pulley to the shaft.

K designates a screw-threaded shipper bar or rod, and K' designates a nut, by the turning of which the rod or barK is moved longitudinally, and through tappets d is caused to move the clutch J2, a suitable trip-motion being employed in connection therewith. 109

oscillated in the other direction.

Inasmuch as all the above-mentioned parts are common in machines already in use, a fuller description thereof is unnecessary, my invention consisting solely in the construction of the nuts I2 and K and the mechanism employed to operate them.

As represented in Fig. 2, the nut I2 has a bearing in an arm, e, by which it is held from longitudinal movement, and the nut K has a similar bearing, f, in the end frame, A, for a like purpose. As clearly shown in Fig. 1, both nuts are made circular and toothed at the periphery, so that they constitute spur-pinions; butin lieu thereof they might have separate pinions fixed to their sides.

L designates a lever, secured upon the face of the end frame, A, by means of a stud or bolt, g, which passes through a slot, h, and has a head which overlaps the sides ot' the slot and holds the lever against the end frame, as well as constitutes a fulcrum therefor.

Upon the driving-shaft .I is an eccentric, M, and the end of the leverL is fitted to the same, so that the rotation of the shaft and eccentric imparts a slight oscillating movement to the lever as well as a reciprocal movement.

Theupper end of the lever L is here shown as bifurcated or forked, so as to embrace the nut I2, and the fork has upon its inner faces teeth it', both of which teeth are brought into engagement lwith the toothed nut I2 during a complete revolution ofthe driving-shaft J, one tooth acting while the lever L moves upward and is oscillated in one direction, and the other while the said lever moves downward and is This turning of the nut I2 moves the screw longitudinally, and through thetoothed feed-barHturns the stock E, carrying the burnishers, and moves the stock so as to feed the burnishers from one side to the other of the spoon-bowl while they are moved quickly from end to end thereof.

It isobvious that the lever L might have only one tooth, t', in which case the nut l2 would only be turned half as fast as when it has two teeth 5 and,'it' desired, a crank might be fixed' curved or crooked, so as to pass upon one side of the lint K 5 but it might, if desirable, have an opening in it to permit of its fitting over the nut.

It is obvious that when the eccentric M is rotated in the direction indicated by the arrow the tooth j engages with the nut K upon the downward movement of the lever, and that the tooth t simultaneously engages with the nut l2, while the tooth t' engages with said nut during the upward movement of the lever. If thc direction of the movement of the eccentric be reversed the tooth t will engage during the downward movemen t of' the lever and the tooth t" during its upward movement.

This feed-motion which l have invented is very simple and composed ot' iew parts, and is therefore very desirable.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with the feed-bar and feed-screw of a burnishing-machine, of a nut fitted to said screw, adapted to rotate in fixed bearings, and having a spur-pinion formed upon or attached to it, a pivoted lever provided with a tooth or teeth, and a crank or eccentric for imparting to said lever an oscillating and a reciprocal movement to cause the tooth or teeth to engage said pinion and rotate said nut in either direction, according to the direction of rotation ofthe crank or eccentric, sub stantially as and for the purpose specified.

2. The combination, in a burnishing-machine, with the feed-bar and feed-screw and with a screw-th readed shipper rod or bar for reversi n g the movement of the machine, of nuts titted to said feed-screw and shipper rod or bar, adapted to rotate in fixed bearings and having spurpinions formed upon or attached to them, a pivoted lever provided with teeth, and a crank or an eccentric for imparting to said lever au oscillating and reciprocal movement to cause said teeth to engage with said pinions and rotate both ot' said nuts, substantially as and for the purpose specified.

3. Thecombination,in aburnishing-machine, with the feed-bar H, feed-screw I, and shipper rod or bar K, of' the nuts l2 K', the lever L, forked at its upper end and provided with teeth it for engaging with the nut I2 on opposite sides thereof, and a tooth, j, for engaging with the nut K', and the eccentric M or a crank, all operating substantially as specified.

WILLIAM W. WHITE.

Witnesses:

EDWARD F. COLE, LE RoY UPsoN.

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